NULL Pointer Dereference Affecting xorg-x11-server-common package, versions <0:1.20.4-7.el7
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-CENTOS7-XORGX11SERVERCOMMON-2140912
- published26 Jul 2021
- disclosed26 Jun 2017
Introduced: 26 Jun 2017
CVE-2018-15861 (opens in a new tab)How to fix?
Upgrade Centos:7 xorg-x11-server-common to version 0:1.20.4-7.el7 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream xorg-x11-server-common package and not the xorg-x11-server-common package as distributed by Centos.
See How to fix? for Centos:7 relevant fixed versions and status.
Unchecked NULL pointer usage in ExprResolveLhs in xkbcomp/expr.c in xkbcommon before 0.8.2 could be used by local attackers to crash (NULL pointer dereference) the xkbcommon parser by supplying a crafted keymap file that triggers an xkb_intern_atom failure.
References
- https://access.redhat.com/security/cve/CVE-2018-15861
- https://security.gentoo.org/glsa/201810-05
- https://github.com/xkbcommon/libxkbcommon/commit/38e1766bc6e20108948aec8a0b222a4bad0254e9
- https://lists.freedesktop.org/archives/wayland-devel/2018-August/039243.html
- https://access.redhat.com/errata/RHSA-2019:2079
- https://usn.ubuntu.com/3786-1/
- https://usn.ubuntu.com/3786-2/